On the stability in higher derivative quantum gravity

Abstract : We present a general, albeit brief review of the recent works on stability of tensor modes in the fourth and higher derivative models of quantum gravity. There are some indications that the presence of Planck-mass ghost does not imply an instability of the classical cosmological solutions with respect to metric perturbations if the initial frequency of such perturbation is far below the Planck scale. The situation is different for a tachyonic ghost, where there is no Planck-mass threshold.
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Communication dans un congrès
14th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories, Jul 2015, Rome, Italy. 3, pp.2243-2251, 2017, 〈10.1142/9789813226609_0257〉
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https://hal.archives-ouvertes.fr/hal-01669851
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Soumis le : jeudi 21 décembre 2017 - 01:10:50
Dernière modification le : dimanche 19 août 2018 - 21:04:27

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Filipe Salles, Ilya Shapiro. On the stability in higher derivative quantum gravity. 14th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories, Jul 2015, Rome, Italy. 3, pp.2243-2251, 2017, 〈10.1142/9789813226609_0257〉. 〈hal-01669851〉

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